Figure 2: Valley-dependent oscillations of spin and layer polarizations. | Nature Communications

Figure 2: Valley-dependent oscillations of spin and layer polarizations.

From: Magnetoelectric effects and valley-controlled spin quantum gates in transition metal dichalcogenide bilayers

Figure 2: Valley-dependent oscillations of spin and layer polarizations.

(a) Bloch sphere spanned by superposition states of the doublet {|K↑, |K↓}. Dark and light blue arrows denote the effective fields from the magnetic field components Bz and Bx respectively, and green arrow denotes that from the electric field Ez. Yellow arrow is the total effective field. (b) Anomalous precessions of the spin vector s when layer is traced out. (c) Oscillations of the spin (sz) and layer (σz) polarizations in magnetic field (Bx, Bz)=(B0 cos 10°, B0 sin 10°), from the initial state |K↑. The oscillations are electrically tunable. (d–f) Same plots in valley −K. The unit of time is .

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